Tool-holder.



N0 MODEL.

PATENTED OCT. 25, 1904.

F. P. PFLEGHAR.

-' TOOL HOLDER.

APPLICATION FILED 0012.24, 1903.

2 SHEETS-SHEET 1.

PATENTED 00T.25,19b4.

F. P. PPLEGHAR.

TOOL HOLDER.

APPLICATION FILED 00124, 1903.

2 SHEETS-SHEET 2.

N0 MODEL.

UNTTED STATES Patented October 25, 1904.

PATENT Orrrcn.

TOOL-HOLDER.

SPECIFICATION forming part of Letters Patent No. 77 3,338, dated October 25, 1904.

Application filed October 24, 1903. Serial No. 178,358. (No model.)

To all whmn it may concern.-

Be it known that I, FRANK P. PFLEGHAR, a citizen of the United States, and a resident of New Haven, in the county of New Haven and State of Connecticut, have invented a new and useful Improvement in Tool-Holders, of which the following is a specification.

This invention relates to an improvement in tool-holders, and has more particularly for its object to provide means for rigidly holding a die-cutting tool up to its work, so as to insure absolute accuracy in the cutting of the die.

My invention is herein represented as applied to a die and pattern making machine; and it still further consists in improved means for permitting the accurate adjustment of the cutting-tool both in a vertical plane and in a rotary plane. Y

A practical embodiment of the invention is represented in the accompanying drawings, in which Figure 1 represents the upper portion of a die and patter-n making machine in side elevation with my improved tool-holder applied thereto. Fig. 2 is a top plan view in detail of thedevice for steadying the upper end of the tool. Fig. 3 is a top plan view of the tool-holder and its vertically-reciprocating support. Fig. t is a side view of the same, one of the tool-holder sockets and its tool being swung up into its operative position and locked therein and the remaining tools being shown in their dropped or folded position. Fig. 5 is a vertical central section in one plane through one of the tool-holder sockets, showing the tool-shank in full lines in one of its vertical positions and in dotted lines in another of its vertical positions. Fig. 6 is a vertical central section taken through one of the tool-holder sockets in a plane at right angles to that shown in Fig. 5, the shank portion of a tool being shown in position therein. Fig. 7 is a transverse section through the toolholder socket. Fig. 8 is a detail plan view of the clamping-ring. Fig. .9 is a view in side elevation of the shank-holding block. Fig.

10 is a face view of the spacing-block, and

Fig. 11 is a transverse section showing the means forseouring the shank of a tool without the use of the spacing-block.

The tool-holder support is denoted by 1, ant it is reciprocated through a pitman 2, operated by any desired means. (Not shown herein.)

The tool-holder is denoted by 3, and it is herein shown as provided with five arms 4:, to the free ends of which the tool-holder sockets 5 are hinged to swing vertically into and out of operative position. This tool-holder 3 is rotatably mounted on a reduced portion 6 of the support 1. A stationary arm 7 is secured to the top of the support 1 above the toolholder 3 by means of a set-screw 8. This arm 7 is provided at its upper end with a curved seat 9, against which the socket 5 is clamped when swung up into .its vertical operative position.

vided with a curved cam-surface 13, which is so shaped that it will be caused to engage thesocket 5 opposite the seat'9 and cramp the,

socket firmly into position when the arm 11 is swung inwardly. Then it is ClGSlIGCl'iJO release the socket, the lever l0 11 may be quickly swung out of its cramping engagement with the socket, thus permitting the socket to be swung down into its folded position and allowing the tool-holder to be rotated to bring a socket containing another tool into position to be swung up into engagement with the arm 7 for being cramped in its operative position.

Each of the arms t of the tool-holder is provided with a stud 14, upon which the socket 5 is hinged to swing vertically. further provided with a lug 15, the top of which is engaged by an adjusting-screw 16, carried by a lug 17 on the socket when the socket is in its operative position. The socket 5 is further provided with an abutment 18, which engages the bottom of the lug 15 on the arm 4 for limiting the inward movement of the socket when folded down into its inoperative position. It will be seen that the adjust- The means which I have shown for clamping the socket in this position comprises; a two-armed lever 10 11, pivoted at 12 to the arm 7. The arm 10 of the said lever is pro The arm A isfollows: The bore of the socket 5 is denoted by 19. The mouth of the socket is cut away along one side thereof, as shown at 20. A clamping-ring 21 is fitted to the exterior of the socket around its mouth, which clamping-ring is provided with a set-screw 22, arranged to clamp the shank 23 of the tool 24 within the socket, as will hereinafter appear. This clamping-ring 22 has its inner wall flattened opposite the cut-away portion 20 of the mouth of the socket, as shown at 25, to permit a slight rotary movement only of the ring 21 on the socket. A shank-holding block 26 is inserted within the bore 19 of the socket, the said block being provided with a small bore 27 therethrough which loosely embraces the shank 23 of the tool 24 when the shank is inserted therethrough. The block 26 is provided with a cut-away portion 28, leaving an extension 29, having a flat face against which one side of the shank 23 of the tool is pressed by the setscrew 22 of the clamping-ring 21. When the shank of the tool has two flat faces, as shown in Fig. 11, the set-screw 22 may be directly engaged with one face of the shank for clamp; ingitin position within the socket. Where the shank is curved in cross-section, as shown in the balance of the figures, a spacing-block 30 is inserted within the socket opposite the cutaway portion 28 of the block 26. This spacing-block is provided with a groove 31 for receiving a portion of the shank 23. The outer face of this spacing-block 30 is flattened, as shown at 32, against which face the setscrew 22 impinges for clamping the shank within the socket. The free end of the tool 24 is rigidly supported when the tool is in use by means of an adjustable bar 33, having a recess 34 in its outer end for receiving the free end of the said tool. The shank 35 of the tool-supporting bar 33 slides through a clamp 36, carried by the upper end of a frame 37, connected, through a link 38, with the reciprocating support 1 of the tool-holder.

The structure herein shown and described permits of the following adjustments of the tool, so as to bring the tool with extreme accuracy into the desired position for operation on the work. The tool-holder support 1 is lowered to a position which will permit the tool to be swung into a vertical position. The

tool-holder is then rotated until the desired tool is brought into a position where the tool may be swung up into engagement with the arm 7, and after the set-screw 16 has been adjusted to get a vertical position for the tool the cramping-lever 1O 11 is engaged with the tool-holder socket for looking it in position. 1

The set-screw 22 is then released sufficiently to permit the tool to be rocked on its own axis slightly to bring the face of the tool into the desired position with respect to the work to be done. The tool may then be rocked slightly in one or the other direction to swing its edge in a diagonal direction with respect to the hinged connection between the socket and arm to complete the adjustment of the tool. WVhen the tool has been thus adjusted, the set-screw is tightened, thus clamping the tool in its adjustment within the socket. The support 1 of the tool-holderis then raised to bring the tool up through the work-table of the machine. The supporting-bar 33 for the free end of the tool is then adjusted to bring its recess 3 k into engagement with the end of the tool. The clamp 36 is then tightened, thus rigidly holding the tool in position.

\Vhile I have shown this invention as applied to a die and pattern making machine, it is to be understood that it may be used in connection with machines of many different forms used for other purposes.

What I claim as my invention is 1. A vertically reciprocating support, a multiple-armed tool-holder rotatably mounted thereon, sockets hinged to the arms of the tool-holder, a laterally-extended arm aflixed to the support, and a lever carried by the arm having a cam-face for cramping one of the sockets between it and the laterally-extended arm to hold the socket in its operative position.

2. A vertically reciprocating support, a tool-holder carried thereby, a tool having one end engaged by the tool-holder, a frame car- ,ried by the reciprocating support and an adjustable bar extending downwardly and forwardly and engaging the tool at an angle thereto for holding it rigidly up to its work.

3. A tool-holder, atool-holder sockethinged to swing vertically thereon, means for adjusting the socket in a vertical plane with relation to the tool-holder, a tool carried by the socket and means for adjusting the pos.tion of the tool within the socket in a direction at an an gle to the adjustment of the socket with relation to the tool-holder.

4.. A tool-holder, a socket hinged thereon, means for adjusting the socket in a vertical plane with relation to the tool-holder, a tool within the socket and means for adjusting the tool in a rotary direction and also in a vertical plane at an angle to the axis of the socket.

5. A tool-holding socket, a block within the socket, a clamping-ring engaging the socket, a tool fitted to be swung into different vertical and rotary positions with respect to the socket and a set-screw carried by the clamping-ring for clamping the tool in its different portions at its mouth, a clamping-ring engag- In testimony that I claim the foregoing as ing the socket opposite the cut-away portion, my invention I have signed my name, in pres- IO a block Within the socket having a rotary adence of two Witnesses, this 19th day of Octojustment with respect thereto, said block beher, 1903.

5 ing' fitted to loosely retain the tool Within the FRANK P. PF LEGHARQ socket and a set-screw carried by the clamp- WVitnesses: ing-ring for clamping the tool in its different FREDK. HAYNES,

adjustments With respect to the socket. R. B. SEWARD. 

